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copied!<p>@Martin Morgan noted that this was termed tab completion. The package <code>rcompletion</code> and later <code>rcompgen</code> were tasked with achieving this. They have been now moved to <code>utils</code>.</p> <p><a href="http://r.789695.n4.nabble.com/R-R-pkgs-rcompletion-update-td815363.html" rel="nofollow">rcompletion update</a></p> <p>I looked thru the code for <code>completion.R</code> and from what I could determine <code>utils:::.DollarNames.environment</code> was handling tab completion for reference classes.</p> <p><a href="http://svn.r-project.org/R/trunk/src/library/utils/R/completion.R" rel="nofollow">completion.R</a></p> <p>Redefining the function seemed to achieve tab completion:</p> <pre><code>assignInNamespace( x = ".DollarNames.environment", function(x, pattern = "") { y <- NULL if(isS4(x) && !is.null(x[['.refClassDef']])){ if(.hasSlot(x$.refClassDef,'refMethods')){ y<-x$.refClassDef@refMethods y<-ls(y, all.names = TRUE, pattern = pattern) } } x<-ls(x, all.names = TRUE, pattern = pattern) unique(c(x,y)) } ,ns = "utils") </code></pre> <p>Some things to note:</p> <ul> <li><p>I would only use this for my own use. Currently I am debugging and documenting a package. I had some longish method names and couldnt remember exactly what they were so tab completion will help greatly.</p></li> <li><p>Usage of <code>assignInNamespace</code> in a package is frowned upon (if not banned) see <code>?assignInNamespace</code>.</p></li> <li><p>Forced definition of methods is more advisable.</p></li> </ul>

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